Key for watchmen&#39;s clocks and securing device therefor.



PATENTED FEB. 11, 1908.

A. A. NEWMAN. KEY FOR WATOHMENS CLOCKS AND SECURING DEVIO E TI-LBREFORx APPLICATION FILED SEPT. 19. 1906.

' as is used-in UNITED snares rn'rnnr caries.

ABRAHAM A. NEWMAN, OF CHICAGO, ILLINOIS.

F6 12 WATCHEEENS CLOCKS AND SECURING DEVICE rmnnron.

No. averse.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed September I9, 1906. Serial No. 335347 key or watchmans clock and securing device therefor, and is fully described and explained in this specification and shown in the accompanying drawings, in which Figure 1 is a perspective view of one of my keys supplied with the securing device; Fig. 2 is a, view partly in elevation and partly in longitudinal section showing the manner in which the keys and securing devices are assembled; Fig. 3 is a similar section showing the completed key; and Fig. his a perspective view of the link by which the supporting chain and keyare secured together.

Referring to the drawings, A, is a key such portable watchmens clocks of the type in w ich the watchman carries the clock from station tostation, marking it in a suitable manner with a key at each station. In the use of such clocks it is obvious that the eificiency of the system as a check upon the watchmen depends in large measure upon the keys being immovable at the several stations, for if the watchman can readily remove the keys and replace them without detection, he can collect all the keys in a single round of stations and use them at the proper times to produce a perfect record, making only one more visit to the stations to return the keys when it is time for him to go oil duty. For this reason the greatest care is.

necessary in securing the keys' in place. It has beencustoma-ry in the ast to use what is known as plumbers or saiety chain, which tion,-to secure one end of the chain-t0 the key upon careful investigation will show mutilaand to fasten the other end in place in a pa-' trol box by means of a seal. In following this practice, however, ithas been customary "to form the key with an integral eye over any ordinary way.

which the bent edge of the first link of the chain is passed. The bent-end of the second link fastens the ends of the first link together, and so on as in ordinary safety chain. However, this practice has obviously necessitated the complete taking down and building u. of the chain each time'a key was to be attac ed to a chain, for the reason that the ends of the first link of chain cannot ,be separated without removing from place every other link.

, In my present invention I aim to secure a fastening by which the chain can be secured to'the key firmly and without possibility of removal without the' necessity of passing the first link through an eye on the key. To this end I bore in the u per end of the key, A, a hole, a, which is a apted to receive the two ends, I), b, of a link, B, made in the shape of an ordinary cotter-pin, the ends, 6, being notched out at If, to produce shoulders, 6 facin toward the head or eye in the link. This k, B, is threaded through either end link of the ordinary safety or plumbers chain, although I prefer to thread it throu h the last link, as illustrated, i. 12. through t e link which has two free eyes exposed which can be separated to disassemble the chain. Having passed this link through the link of the chain, I insert its ends in the opening, a, and clench the material of the key down upon said link, as illustrated in Fig. 3, so that the material of the key is forced into intimate contact with the link and lies in front of the shoulders thereon making removal thereof impossible. The 0 posite end of the chain can then be secured in the patrol station in It will be seen that the link, B, is mechanically similar to the remaining links of the chain, its ends being specially shaped, however; so as to engage readily with the end of the key.

It would doubtless be possible to devise other forms of links for engagement with the key, onto devise keys Withwhich the ordinary end linkwould engage readily; and. by describing the form which I prefer to secure- Q arenas this result, I do not mean to limit myself that portion of the end link of the chain 10 thereto except as pointed out in the followformed by the adjacent openings of the free ing claims. end of said link and having its free ends inhat I claim as new and desire to secure serted in the recess in the key and per- 5 by Letters Patent, ismanently secured therein.

The combination with a key provided ABRAIIAM A. NEWMAN.

with a recess in its handle, of securing means In presence oftherefor comprising a section of safet chain L. HEISLAR,

and an open-ended link threaded t ough J. H, LANDIS. 

